The sulflde stress cracking susceptibility of high strength steels used for oil grade tubulars (GCTG) was found to correlate with the hydrogen concentration inside the metal, in equilibrium with the H2S saturated solution at different temperatures and pH values. This correlation can be applied to extrapolate laboratory tests results, obtained using standardized solutions, to actual field conditions.
Keywords: Sulfide Stress cracking, High strength steels, Fracture Mechanics, Sour Service, Hydrogen Permeation, Testing Criteria